Astrophotography by Walt Davis

M13 (The Hercules Globular Cluster)  is one of the most prominent and best known globular cluster of the Northern celestial hemisphere. Also known as the ‘Great Hercules Globular Cluster. This picture was taken with a Nikon D70, 600mm f4 ED Lens, and TC-301 2x Teleconverter. By Walt Davis.

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Object Information

Name: M13, NGC 6205
Type: Globular Star Cluster
Description: M13 is one of the most prominent and best known globular cluster of the Northern celestial hemisphere. Also known as the ‘Great Hercules Globular Cluster. This picture was taken with a Nikon D70, 600mm f4 ED Lens, and TC-301 2x Teleconverter.
Magnitude: 5.8
Size: 20 x 20 arcminutes
Related Photos: none

References:

M13 Globular Star Cluster
Hercules Constellation
Google Images
Acquisition

Location:

Latitude 44.841N by Longitude -122.869W at an elevation of 87 meters.
Aumsville, Oregon USA

Date:

 October 22 & 24, 2008

Zone: -8 (Pacific Standard Time)
Equipment

Imager:

Nikon D70

OTA:

Nikkor 600mm f4 ED super telephoto lens
Barlow: Nikon TC-301 2x Teleconverter doubling the focal length to 1200mm
Platform: 2X Super Modified Nikon Imaging Platform
Guiding: Phillips WebCam, Nikkor 300mm f2.8 ED lens, and PHD Guiding.
Imaging
Mode: Mode 2
White Balance: Sunlight

Color Space:

sRGB
Format: RAW (3008 x 2000)

Light frames:

3 x (5 min @ ISO 800),  6 x (8 Min @ ISO 1600)

Darks:

none

Flats:

none
Filters: Baader Moon & Sky Glow
Mask: none
f-stops: f16 with Barlow
FOV: 68 x 44 arcminutes
Scale: 1.35 arcseconds per pixel
Software: Nikon Capture 4 Control
Image Processing

Stacking:

Deep Sky Stacker 3.2.1

Combined:

Average
Processing: PhotoShop CS3, Astronomy Tools CS2 V1.5, New Astro Zone System, Noiseware Professional Plugin.
Notes

none

Copyright © 2008 Walt L. Davis All Rights Reserved